Fehlertolerierende Rechensysteme: 2. GI/NTG/GMR-Fachtagung / by P. Corsini, L. Simoncini, L. Strigini (auth.), K.-E.

By P. Corsini, L. Simoncini, L. Strigini (auth.), K.-E. Großpietsch, M. Dal Cin (eds.)

In the decade of machine technology improvement, we will become aware of a starting to be curiosity in fault-tolerant computing. This curiosity is the results of a emerging variety of appl'ications the place trustworthy operation of computing structures is an important requirement. along with uncomplicated learn within the box of fault-tolerant computing, there's an expanding num­ ber of structures specially designed to accomplish fault-tolerance. it's the aim of this convention to provide a survey of current examine and improvement actions in those parts. the second one GI/NTG/GM~ convention on Fault-Tolerant Computing structures has had a preparatory time of approximately years. In March 1982, the 1st GI convention referring to fault-tolerant computing platforms used to be held in Munich. one of many result of the convention was once to carry an organiza­ tional framework to the FTC group in Germany. This ended in the founding of the typical curiosity staff "Fault-Tolerant Computing platforms" of the Gesellschaft fur Informatik (GI), the Nachrichtentechnische Gesellschaft (NTG), and the Gesellschaft fur MeB- und Regelungstechnik (VDI/VDE-GMR) in November 1982. at the moment, it used to be additionally made up our minds to agenda a biannual convention on fault-tolerant computing structures. one of many pursuits of this moment convention is to reinforce the family members with the foreign FTC neighborhood; hence, the decision for papers used to be prolonged not just to German-speaking nations, yet to different international locations as well.

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Extra resources for Fehlertolerierende Rechensysteme: 2. GI/NTG/GMR-Fachtagung / Fault-Tolerant Computing Systems 2nd GI/NTG/GMR Conference / Bonn, 19.–21. September 1984

Example text

10 Object descriptor The type field points to the type object that is a special module referring to the procedures that constitute the type specific operations for the referenced object. s the data segment comprising the object's data that can be manipulated by the TOs. The recovery field stores the following recovery related information: r The recoverable bit indicates whether the corresponding object is specified as recoverable or not. 37 m The modified bit signals whether the object was modified since the last recovery point was established.

Another task results from the assumption introduced in section 4 that the eRG is not statically predefined; rather, the eRG dynamically grows mirroring the course of system activity. As a consequence, in case of system failures the necessary recovery line is not predefined, but also has to be dynamically established. Here, we adopted the idea of the "chase protocols" [MeR]. Invalidity of recovery units is propagated through the system according to the propagation rules described in section 4. This implies that the recovery subsystems have to cooperate in establishing a recovery line by chasing each other's recovery units according to the rules.

7/ G. Weber. "FUTURE, ein fehlertolerantes Multimikrorechnersystem Monitor", Diplomarbeit Lehrstuhl fUr ProzeBrechner TU MUnchen, 1984. /8/ F. Demmelmeier. -28. Sept. 1984, Karlsruhe. /9/ T. Lingenthal. "FUTURE, sin fehlertolerantes Multimikrorechnersystern - Analyse und Implementierung eines technischen Prozesses", Diplomarbeit Lehrstuhl fUr ProzeBrechner TU MUnchen, 1984. Implementing Yault-Tolerance in a Distributed System Architecture E. Nett K-E. Grosspietsch J. Kaiser R. Kr(iger Gesellschaft fUr Mathematik und Datenverarbeitung Schloss Birlinghoven 5205 St.

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